• LTC3129 NC pins

    The LTC3129 datasheet states that the NC pins (8+9 or 6+7) should be grounded. Does that mean that these pins are internally connected, or can they be connected to VCC instead? The latter alternative would make the layout compatible with the LTC3129-1…

  • DC1923A, LTC3129-1 Buck Converter

    Hi,
    Presently i am working on an energy harvesting project for my engineering project demo. my harvester produces 12V and 25mA and i need to convert the harvester output into 5V and 40mA.

    In analog devices website, i saw a DC1923A evaluation board which…

  • RE: LTC3129 Efficiency loss

    Given your operating conditions, I would not expect 80% efficiency.  The curves in the datasheet, and in the demo manual show efficiency for a given output voltage.  Since your output voltage is significantly lower it is hard to compare those graphs directly…

  • LTC3129 DC1922A Feedforward Network

    On the DC1922A board, a 2.2k resistor was added to the feedforward network (which was not discussed in the LTC3129 datasheet). How do I decide if I need to add the resistor, and what value should be chosen? Is looking at transient step response in a LTSpice…

  • RE: low frequency PM

    After the bridge rectifier, you may want to consider the buck-boost solutions that we have. Please try to check this link: https://www.analog.com/en/parametricsearch/11503#/p5362=Buck-Boost

    If the link won't work, please search in ADI website these generics…

  • RE: LTC3108 vs BQ25570 (from TI)

    There are several Energy Harvesting devices available from Analog Devices that are optimized for a variety of applications.  For solar cell applications where Vin is typically higher than 1-2V, the LTC3129, LTC3106, and/or the LTC3105 may be a better fit…

  • RE: LTC3103 Drop-Out Seems very high...

    Hello Andersoj88

    The diagram you mentioned is correct and additionally you should check following parameter in the ds:

    As you have not much means to overcome your problem with a standard Buck regulator (n-channel based, DC always <100%) you might consider…

  • RE: Solar powered lithium charger with LTC3105 & LTC4071

    Hi,

    I think I replied to your comment you asked about LTC3105 in another message. As mentioned LTC3105 will work for Vin>Vout however it will not be efficient. Also your Vin is above the input voltage range. Operating the part higher than the input voltage…

  • LTC3119的MPPC功能无法使用,是模型的问题还是?

    同样的帆板模型和电池模型,为什么LTC3129能很好的仿真出来,而LTC3119就不行?

    先看LTC3129仿真电路:

    左边太阳电池的模型  Mppt: 13V, 2.2W, 170mA  

    下图可以看出,随着MPPC分压电阻的不同,太阳电池Vin, IRin工作在不同的电压和电流下

    再来看LTC3119,几乎同样的电路

    仿真结果为:

    上图上半部分为输入的电压Vin, IRin, Vmppc, 下半部分为输出Vout, IRout, Vfb

    可以看出,无论左边的Mppc分压电阻怎么调节…

  • RE: Parallel solar panels with LTC3105

    Hi,

     

    The input operating voltage for LTC3105 is 0.225V to 5V. 6V is the absolute max rating. The part might not fail till the abs max value however its behavior and performance is not guaranteed beyond the operating voltage mentioned in the electrical…